Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf459e0eb146574…

MALICIOUS

PDF

88.7 KB Created: 2020-11-09 19:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 34af051e2fd9807626b18077ee23d3a6 SHA-1: b6ac654c8b9c8b742f36cf70c7b01d06641c4ddc SHA-256: daf459e0eb146574877d48f2b15f60b6b82a943d9b4a1e8808b08ad90cf62ccc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafficel.ru/strik?keyword=marine+corps+survival+training+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418379/normal_5f9fca68bd875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_5f99ec7086fdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tadovu/jukegox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8589ca7a-3ead-414c-97a9-18de64bda430/27600052417.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/mutepopajev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683e6559-6390-4b6a-9b83-1a0c8cad578c/40121225653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab209af8-85ee-4b5a-9f34-040d9b081c54/murakubusaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac80aa5-298d-4a9d-9b36-b27117deccb0/10159753057.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/vygotsky_scaffolding_definition_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b657b9-47ce-48d2-ae02-5f8f912c19b1/slipknot_1999_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/75223371275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f91106-9a86-438b-ae3f-9d141a9c50e8/como_poner_el_formato_apa_en_word_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/mebef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0bf842-d044-417a-af77-697cc445a372/nunazibiwol.pdfIn PDF document text
    • https://s3.amazonaws.com/tifemuma/kenmore_elite_gas_stove_top_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F80 5316 bytes
SHA-256: d608ec447b24d70e5a64a5ab488bc781e7019ade196db810d41e47c957bf40a2
font_01_sfnt_off00013198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13198 10516 bytes
SHA-256: cf65f73a0a26365c5c992420d5c221f4b03bc3a99aab0bdc256b324816e54fd8